He's not going to land there, right?
Oh crap, he is landing there.
He's not taking off by rolling over the ridge into space?
Oh crap, that's exactly what he's doing.
He's not pulling a low-speed 180 back against an unfriendly slope?
Bloody hell, he is doing it.
Since a Piper Cub will fly in a strong fart he can get away with these stunts.
Science IS NOT TRUTH. It is an iterative process asymptotically coming ever closer to Truth, but destined never to arrive there.